Western Sydney Intl climate by month
Averages and records for each calendar month at Western Sydney Intl, Australia, from 1995 to 2026. The warmest month is January, averaging 30.0°C; the coolest is July at 17.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 30.0°C | 17.2°C | 47.6°C4 January 2020 | 8.2°C8 January 1997 | 30 / 31 |
| February | 29.1°C | 17.2°C | 46.5°C1 February 2020 | 8.5°C18 February 1998 | 28 / 31 |
| March | 26.9°C | 15.6°C | 40.4°C6 March 2023 | 6.4°C31 March 2008 | 30 / 31 |
| April | 24.2°C | 11.5°C | 36.0°C6 April 2016 | −0.1°C23 April 2006 | 27 / 31 |
| May | 20.8°C | 7.7°C | 29.4°C1 May 2016 | −1.1°C16 May 1999 | 29 / 31 |
| June | 17.8°C | 5.6°C | 25.2°C14 June 2004 | −3.0°C17 June 1999 | 29 / 31 |
| July | 17.7°C | 4.3°C | 27.0°C30 July 2017 | −4.5°C12 July 2002 | 27 / 31 |
| August | 19.5°C | 5.0°C | 29.9°C30 August 2024 | −2.0°C7 August 2019 | 28 / 31 |
| September | 22.8°C | 7.8°C | 36.4°C23 September 2017 | −0.5°C5 September 2003 | 29 / 31 |
| October | 25.0°C | 10.7°C | 37.4°C6 October 2015 | 2.2°C8 October 1998 | 28 / 30 |
| November | 27.0°C | 13.7°C | 47.2°C28 November 2020 | 5.3°C3 November 2003 | 28 / 31 |
| December | 28.7°C | 15.5°C | 44.6°C31 December 2019 | 6.6°C7 December 2002 | 27 / 31 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 27 to 30 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.